CSS3自定义图标

http://ntesmailfetc.blog.163.com/blog/static/206287061201292631536545/

 

http://www.zhihu.com/question/22022905/answer/20585820

 

http://www.w3cplus.com/solution/css3content/css3content.html

 

http://www.w3cplus.com/solution/css3content/images/html.png